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diff --git a/WebCore/html/HTML5TreeBuilder.h b/WebCore/html/HTML5TreeBuilder.h
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+/*
+ * Copyright (C) 2010 Google, Inc. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL GOOGLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#ifndef HTML5TreeBuilder_h
+#define HTML5TreeBuilder_h
+
+#include <wtf/Noncopyable.h>
+#include <wtf/OwnPtr.h>
+#include <wtf/PassRefPtr.h>
+
+namespace WebCore {
+class Document;
+class HTML5Lexer;
+class HTML5Token;
+class HTMLDocument;
+class HTMLParser;
+class Node;
+
+class HTML5TreeBuilder : public Noncopyable {
+public:
+    HTML5TreeBuilder(HTML5Lexer*, HTMLDocument*, bool reportErrors);
+    ~HTML5TreeBuilder();
+
+    // The token really should be passed as a const& since it's never modified.
+    PassRefPtr<Node> constructTreeFromToken(HTML5Token&);
+    void finished();
+
+private:
+    PassRefPtr<Node> passTokenToLegacyParser(HTML5Token&);
+
+    // We could grab m_document off the lexer if we wanted to save space.
+    Document* m_document;
+    bool m_reportErrors;
+    // HTML5 spec requires that we be able to change the state of the lexer
+    // from within parser actions.
+    HTML5Lexer* m_lexer;
+
+    // We're re-using logic from the old HTMLParser while this class is being written.
+    OwnPtr<HTMLParser> m_legacyHTMLParser;
+};
+
+}
+
+#endif